二甲基亚砜

7-氯-1-环丙基-6-氟-4-氧代-1,4-二氢-喹啉-3-羧酸乙基酯

2,4-二氯-5-氟苯酰氯

1-环丙基-6,7-二氟-4-氧代-1,4-二氢喹啉-3-羧酸乙酯

ethyl 1-cyclopropyl-6-fluoro-1,4-dihydro-7-nitro-4-oxoquinoline-3-carboxylate